Starting at $488.00 Starting at $439.20
  • Usually ships in 3-4 weeks



  • -30 to 120°C (-4 to 248°F)
  • 0 to 100 %RH
  • Wall or duct mount, cable option
  • Multiple cable lengths


The digital probes for use with the Testo 6651 humidity transmitter are available in wall mount, duct mount or cable models. Measurement parameters include: %rf / %RH, °Ctd / °Ftd, °C/°F. Depending on the model, the probes are made of ABS plastic or stainless steel.